Coffee percolator



vns

Patented' June 9, 1931v `insurer,sfm'rizs Josera AieUEnm, sa..

AND 1r. GUERIN, or rnnannarnm,

I conm rnr'tconaron apaucauon mea october 15, 192s. serial NOI 312,597.

Ourinvention relates to certain improve.- ments in percolators for the preparation oi coiee beverages and the objects of our' invention are to sov construct and arrange the parts of a percolator that an infusion of finest quality may be invariably obtained without the exercise of any particular care or attention on the part of the one using the device,

once the proper amount of water and pulverview through the assembled percolator, porized coffee have been placed therein.

A further object of tainer or basket for pulverized coiee which is l operative to prevent the minute particles of infusion to freely pass through pulverized coee from passing therethrough andl which is also operative to temporarily retain some of the water deliveredvthereto rom the water elevator, to produce in the basket a plashy my bile mass of ,wetl pulverized coiee which is kept ina state of agitation ormovement' y the continual dropping of freshhotwater thereon.' I L A -urther object of ourv invention is to provide a percolator with a basket or. container for pulverized coiee which shall retain substantially all of the4 minute particles of pulverized coee w'thin the basket' orretainer and which will 'permit of the coii'ee those parts of the basket which are not. covered with coliee particles. `A\ further object of our invention is to provide a simple device, having no small or moving parts which arel liable to become dis arranged and misplaced and-wherein all the our 'nvention isl make possible the use of pulverized coiee in'. a percolator similar to h t eboiler.

except loose pulverizedsurface of the coEee. P g

'showing the clamp for the boiler or Waterv con-` -of this invention, comprlses a PENNSYLVANIA surfaces `are accessible and readily kept clean and sanitary.

Further objects of our invention. will appear in the specification and claims below.

In the drawings forming a part of the specification, the same reference characters are employed throughout the various'views to designate the same parts,

Fig. 1, in the main, is a vertical sectional tions of the circular walls ofthe boiler and of the potbeing shown in elevationor the purpose of showing the manner in which the reuired amount of water may be indicated on Fig. -2 is a. vertical sectional view on a larger scale of a portion of the coee container or basket, of the water distributor and of the upper end of the elevator tube on which lthe basket is supported, and showing, in a somewhat conventional manner how the pulverized coee is agitated and splashed during the operation of the device, by the water dripin thereon.

Fig. 3 is an elevational view,

on a greatly magmed scale, of a `fragment of the tine, closely woven wire fabricl of Monel metal, of which the coee container or basket is made. Fig. 4 is a fragmentary view on the same magnified scale as Fig. 3 showing the manner in which thev minuteyparticles of pulverized coffee tend to retard the passage of water therethrough, when the device is operating,

and showing why it is that the said minute solid particlesgdo not completely close the passages through the abric.- v I Fig. 5 is a fragmentary view of the sides of the boiler or water container Aand colee pot, drawing the pot tight down on its seat on tainer,and

Fig. 6 is a iront elevational view of one of the two clamps shown in. Fig. 5 and with which the device is preferably provided. The percolator forming the subject-matter hot water conhaving preferably a vertitainer or boiler A,

1, a flat circular bottom 2 cal vcylindrical wall and an inwardly and upwardly extending ,Bange 3 atthe top end thereof, providing an 59 the shaft 17 are preferably provided with a opening of smaller diameter thant at of the boiler, through which passes the pot Said boiler A is provided with an annular seat 4 adapted to support a gasket or washer 5 upon which the pot is seated when the device is being assembled for, use.` The boiler A is also preferably provided with a handle 6 and with a series of graduations or other suitable indications 7 to indicate the amount of water to be placed in the boiler for the preparation of the quantity of coffee desired.

The pot or liquid coffee container B is also preferably provided with a vertical cylindrical outer4 wall 8 and with a flat bottom 9.

The diameter of the pot B ispreferably a lit tle smaller than the opening at the top of the boiler A so that it may slip readily vertically therethrough until the seat 10, -formed on the underside of a band 11 surrounding and rigidly secured to the pot, rests upon the upper surface of the gasket 5. The pot B is provided with an axially disposed tube or water elevator C which is preferably integral or unitary with the bottom 9 of the pot B and eX- tends upwardly to substantially the level of the top edge thereof. rlhe. lower endof this tube C is preferably provided with'a dome 12, the lower edge of which rests squarely against the bottom 2 of the boiler. Around and near the juncture of the dome 12 and the. tube C, the former is provided with a series of perforations or holes 13 to permit of the entry of water from the pot into the dome, which, with the bottom 2, forms a chamber withinwhich the steam, which elevates the water through the bore 14of the tube C, is generated. The top of the pot B is preferably closed by a lid or cover I) preferably somewhat conical in shape, so as to provide a chamber' within which the water elevated through the tube C v may be deflected and thrown downwardly to the basket F, containing ,the pulverized coffee P.

The boiler A is preferably provided on opposite sides with clamping hooks 15, one of which is shown in Figs. 5 and 6, and which may comprise a handle 16 rigidly secured to a shaft 17 jo-urnaled in a pair of lugs 1818 rigid with the side of the boiler. The ends of pair of eccentric pins 19, 19, one on each end,

and over which are fitted the downwardly eX-' tending arms 20, 2O of a loop 21, the upper end of which isl provided with a hook 22 adapted to take over the edges of an annular upwardly extending peripheral flange 23 -which may be formed integral with the band 11 at the outer edge ofthe seat 10.. 4

In Figs. 5 and 6, the clamping hook 15 is shown in its-locked position. It should be readily understood tha-tto release the hook, one has merely to turn the handle 16 up wardly, thus rotating the shaft 17 in an anticlockwise direction 5) and raising the eccentric pins 19, 19, thus lifting the hook 22 above the flange 23 and permitting one to then by the eccentric pins 19, clear of the iange 23.

By the operation vof these clamping hooks 15, the seat 10 of the pot may be drawn down hard on the gasket 5 to form a substantially steam-tight joint between the boiler and the pot.l `Above the band 11 the cylindrical wall 8 of the pot may be provided with a suitable opening 24 communicating with a spout or lip 25 bymeans of which the contents of the pot B may be poured. l

The tube C is also preferably provided with a shoulder or iiange 26 near the upper end thereof, forming a seat upon which the basket o r-'container E of pulverized coffee P is mounted and supported on the tube C. The basket E is provided with a flat bottom 27 consisting of a flat circular sheet or disk of exceedingly fine closely-woven fabric, the threads of which are preferably of Monel metal. The center of the bottom 27 is provided with a hole and around this hole the inner edge of the fabric is secured, by soldering or any other suitable means, to a ring 28, which in turn is rigidly secured to a tube 29 loosely tting over the upper end of the tube EQ The outer circular edge of the flaty bent to cylindrical shape and the ends of said.

strip are soldered or otherwise vsecured together. rlhe lower edge of said wall 31 is soldered or otherwise secured to the ring 30 and the upper edge is similarly secured to a ring 32. Thus, the tube 29, the rings 28, 30 I' and 32, the flat circular bottom 27 and the vertical cylindrical wall 31 together form a basket r recticular container for holding and retaining pulverized coffee P placed therein.

Referring to Figs. 3 and 4 wherein is shown a fragment of the fabric F of which the bottom and side walls of the basket are constructed and which, as above stated, is onv a greatly enlarged scale, the warp threads 33 of the fabric and the weft threads 34 extend in directions at right angles to each other. The warp threads 33 are preferably spaced at ilo a greater distance from each other than are the weft threads 34. Thus, the warp threads `33 may be spaced twenty vto the inch and the weft threads 34 may' be one hundred and verized coffee. The said weft threads `may A however be beaten up so close to each other that Where they cross on. the line 35-35 v greater pletely clogged or stopped'by a single parp physical contact with each drical wall 8 of the pot,`

contact and the warp wire.

v wall 31 of the basket (Fig. 3) they may be in physical contact. When two consecutive weft threads are beaten up into through the fabric F is the space 36 between two adjacent weft wires and When they are spaced, as in Fig. 3, it is the substantially rectangular space between two adjacent weft threads and two'adjacent warp threads. lIn.

this way, the actual width of the passage through the fabric F may be readily made substantially less than the least or smallest diametral dimension of the particles P of pulverized coffee, and the said particles of 'pulverized coee in the basket E cannot pass through the narrow passages thus provided through the woven wire fabric F, even though the length of the said passages is than the greatest diametral vdimension of a coee particle. By thus making the long dimension of these passages greater andl the short dimension less than al coac` particle, the passage 36 can never become comticle of pulverized coee, and can never be completely closed by a plurality of particles, because the particles are separate and' granular, and theoretically, atleast, they are in other at a single space between Vpoint only, thereby providing of water the particles for the slow seepage therethrough, (see Fig. 3); v

- We prefer to close the top of the basket E with a cover and water distributor G comprising a flat disk 37 having an axially disposed hole therethrough, the inner edges ofthe fabric F around sald hole being soldered or otherwise permanently secured to a ringA 38 and the outer edge of, the ydisk 37 being similarly secured to a larger metal ring 39 so that the inner ring 38 over the upper en'd of the tube or Water elevator C to rest on the upper end of the tube 29 and the outer ring may rest on the top of the ring'32 at the top edge of the basket E. The cylindrical wall 31' of the basket is preferably substantially spaced from the vertical cylin- In making the side or cy 'ndrical Wall 31 of the basket E, we prefer to dispose the warp threadsl 33 vertically and the weft threads 34 horizontally or circumferentially of the basket so that the long dimension of the mesh of the fabric or of theV passage 36 therethrough is circumferential and the short dimension thereof is vertical of the basket. In

other words. the fabric F of the cylindrical will be disposed with the warp threads 33 vertical, as they appear inFig.3. v v

To use the device, the pot B is removed from the boiler A rand water the boiler A suicient for the amount of hquid lcoiee or infusion to be prepared. .If one wishes to prepare four cupsof coee, the

contact with each other the passage' at then' point of l -is placed may be freely passed W is placed .in gl' through the coffee P in the basket EL After f placing the water in the boiler A, the pot B is inserted into the boiler, the seat 10 of the pot B resting on the gasket or washer 5 which is in turn supported on the seat 4.- of the boiler. The clamping hooks 15, and the handle 16 are then swung upwardly on their respective cylindrical bearings to bring the hook 2 2 against the outer surface of. the band 11. Then the handle 16 is swung downwardly, drawing the hooks 15 downwardly, and tightly clamping the washer or gasket 5 between the seat 4 on theboiler' and the seat 10 on the pot, thus making a steam tight joint between the boiler A and the pot B. The

` proper amount of pulverized coffee P is then laced in the basket E. The cover G 1s placed on the basket E and then the cover D in the upper end of th pot B to The devicemay then be p aced upon .The slow applicaclose it. the stove or gas burner.v

' tionof heat to the water contained within the dome 12 generates steam which rises in bubbles and carries small quantities of water upwardlythrough the and projects such water injdrops or short de of the lid D gushes against the inner si whence the water is deected downwardly against the disk or closure G of the basket E.- Ihe flow of water is intermittent, not continuous. The w ater, collecting in drops on the disk Gr falls then onto the pulverized coffee P within the basket E. As soon as the coffee becomes wet, and the water, seeping through the coi'ee, reaches the fiat reticular bottom 27 of the basket, the small' solid particles P of pulverized coffee, carried with the water tend to fill and clog the very small passages 36 through the fa ric F. While cannot completely stop the ow of coiee through the bottom 27,fbecause the passages are longer than the i diameter of the particles of cofee as above described, they substantially check the flow of water through the bottom amount of water that` 'with the result that the the bottom 27 of the actually passes through tube C, and the contents of the basket E become very wet, mobile v and plashy. The

`droppingxof Water romthe cover D into this mass of pulverized coffee, keeps.

constant agitation, the water-a chance toabsorb or eat deal of the flavor or taste ofthe pulverized coffee. As the quantity of water in the basket increases, it rises to a point above that where the particles of pulverized coffee.

wet plas y the mass 1n they thus givmgdissolve abore 14' of the tube C j are so closely packed against the sides of theitents 'of the basket liy upward in all direc-1 tions.- In Fig. 2 we have indicated in dotted llines the fact that the drops W have fallen and have thrown up the mobile particlesof coil'ee in the basket all around the place where the drop fell forming depressions 4:0. The drops W2, are shown as suspended from the y cover F, over the elevated parts of the upper lsurface of the plashy mass in the basket. When these drops W2 fall, they will form depressions as the drops W did and the depressions forme-d by the drops W will be filled with the plash formed by the drops W2.

of iine mesh fabric above the level of the A a0 It is to be understood that this illustration is diagrammatic, but it serves to clearly explain the nature and character of the roiling, stirring, agitating and mixing of the mobile mass of coffee in the basket E; how the walls above the level of the plashy mass, as well as the cover F, serve to prevent the mass of coffee from splashing out of the basket, and how the basket provides a sufiicient clear area lcoffee in the basket, through which the infusion of coffee, thus formedmay readily ilow and drop down into the pot below it.

' The steam produced by the boiling of the water in the pot surrounds the lower part of lthe pot, is under a slight pressure and keeps the contents of the pot B at the temperature of boiling water or steam. No steam can escape through the^connection between the pot A and the boiler B becauseof the tight `clamping connection above described.

, Therefore, all the water and eventually all the steam generated therein will have to pass out through the bore 14 of the tube C.

In operating the device, the only care that it is necessary to exercise is to see to it that the water does not boil violently. A slow heat is suicint to generate enough steam to project the water in drops or small globules up through the bore 14 against the inside of the lid D. The water should have ample opportunity to agitate the contents of the basket E and izo-abstract the iiavor, of the pulverized coffee therein.

After enough of the water has been thus discharged to expose or uncover the holes or perforations 13, no water will be forced thereafter through the tube C but only steam and the rush 'of steam through the tube gives the housewife or user of the device notice that the operation is complete and that all the Water necessary for making the predetermined number of cups has been transferred from the boiler A to the pot B.

It will also be seen that it is impossible,

in operating the device as above described,

for one to boil or over-cook or under-cookthe coffee and thereby .spoil the product. The water passes but once through the coffee as in preparing French drip coli'ee. The continued boiling of the water, once the predetermined amount of water has been trans- -ferred from the boiler to the pot, does not then the resulting infusionwill be uniform irrespective of quantity. The device is veryv simple; it has few parts; is easily cleaned;"

and it has no parts to get out of 'order or to become detached or lost. The operative parts are' substantially all contained in the boiler and pot andthe separable parts are but five in number.

rThe ne Woven'wire fabric of Monel metal is a fabric to which the coffee does not firmly adhere. It is readily cleaned or-cleared by directing a stream of water against the outside of the basket, whereupon any small particles of pulverized coee part-ly clinging to the mesh of the fabric is readily `floated off and the basket is kept clean.

The cover or closure F for the basket E is for three purposes. (l) It distributes the water coming from the upper end of the tube somewhat evenly all over the upper vsurface of the pulverized coffee in the basket and (2) it provides Aa definite distance through which the drops may fall onto the coi'ee and to agitate the'contents and to keep the contents of the ,basket turbid and roily, and (3) it prevents the minute particles of coffee from splashing up over the edge of the basket and falling into the pot. I The spacing of the side walls of the basketE from the inner wall of the'potfB is ample to allow the coifee passing through the side walls of the basket to How down over the outside of the basket to the pot, but thel space is well outside. of the area over which the Water, delivered from the tube C, is distributed by the curved underside of the lid D.

By the use of our invention. above described, a perfectly clear and delightful in# fusion may be obtained in a percolator structure from pulverized coee. The quantity of pulverized cofee used is relatively small. The basket is relatively large in diameter so that the layer of pulverized coffee in the is suflicient to make the distance through which the water falls to thoroughly agitate l the contents of the basket as above described. Having thus described our invention, what we claim and desire to protect b Letters f basket being made of a "from the bottom Patent of the United States is: j,

1. In apercolator for infusing pulverized a. pot decoffee, the combination of a boiler,

ending downwardly from the top'of said oiler into said Boiler and having its side walls spaced from the walls of said boiler, a basket mounted within the upper part of said pot and having its bottom and side walls made of closely woven wire fabric, the spaces between the warp threads of'which are substantially greater than the greatest diameter of aparticle of pulverizcd cofl'ee and the spaces'b'etween the weft threads 4of-which are smaller than the smallest diametrical dimension of a particle of pulver-ized coffee, said warp threads extending vertically in the side walls of said basket, and means extending of the boiler upwardly to discharge water from said boiler intermittently into said basket faster than the infusion of seep through said coffee and pass through the walls ofsaid basket to said pot.

2. In a percolator for infusing coffee, the combination of a boiler, a pot depending downwardly from the top of' said boiler into said boiler and spaced from the walls thereof, a basketmounted within the upper part of said pot, the side walls of said closely woven fabric, the spaces between the one direction of the fabric, ably mension of a particle of pulverized coee and between the threads extending at right angles to saidA first mentioned threads, beingless than the'smallest diametrical dimension of being considersaid particles of pulverized coffee, and means from the bot-.-

to discharge water upwardly tom of said boiler' into the top of said basket faster: than an infusion 'of coffee so formed in said basket can -seepthrough said pulverized' coffee and-.pass through said fabric to said pot.

In witness our hands this 11th da of October, 1928.

JOSE A. GUERIN, SR.

J AMES M. GUERIN.

coEee formed in said basket can pulverized threads of which, 1n

greater than` the greatest diametrical dl- A whereof, we have hereunto set 

